package com.learn.web;

import javax.servlet.*;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

public class CorsFilter implements Filter {

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
        System.out.println("filter_cors name：" + this.getClass().getName());
        HttpServletResponse resp = (HttpServletResponse) response;
        resp.setHeader("Access-Control-Allow-Origin", "*");
        resp.setHeader("Access-Control-Allow-Headers", "*");
        resp.setHeader("Access-Control-Allow-Methods", "PUT, POST, GET, DELETE, OPTIONS");
        resp.setHeader("Access-Control-Allow-Credentials", "true");
        chain.doFilter(request, response);
        System.out.println("filter_cors_after name：" + this.getClass().getName());
    }

    @Override
    public void destroy() {

    }

}
